Brand New Rockford Fosgate R600-4D Prime Series 600 Watt RMS Class D Full Range 4 Channel Car AmplifierFeatures: 12dB/octave crossover2/4 channel switch4 Gauge power/ground terminalsCast aluminum heatsinkTop mounted controlsCEA-2006 CompliantNumber of Channels: 4RMS Power Handling: 100 Watts x 4 @ 4-Ohms150 Watts x 4 @ 2-Ohms300 Watts x 2 @ 4-Ohms BridgedTotal Power (Sum of RMS Power): 600 WattsCrossover Controls:Front: Variable 50Hz - 500Hz @ 12dB/OctaveRear: Variable 50Hz - 500Hz @ 12dB/OctaveTone Controls: 0dB to +12dB @ 45HzSignal Input: Low Level: 2 RCA PairPower Input Connector: BlockPower Wire Gauge: 4 AWGSpeaker Output Connector: BlockSpeaker Wire Gauge: 12 AWGCircuit Topology Class: Full Range Class-D